| BUNKER, Graeme ACTIVE | Director | 22 Sep 2018 | | England | June 1974 | Darlington Locomotive Works, 9 Bonomi Way, Darlington, County Durham, DL3 0PY, England |
| COURTENEY-HARRIS, Richard John ACTIVE | Director | 01 Jul 2025 | | United Kingdom | October 1957 | Darlington Locomotive Works, 9 Bonomi Way, Darlington, County Durham, DL3 0PY, England |
| DAVIES, Stephen ACTIVE | Director | 28 Jul 2020 | | England | April 1959 | Darlington Locomotive Works, 9 Bonomi Way, Darlington, County Durham, DL3 0PY, England |
| GIBSON, Elizabeth Alexandra Ross ACTIVE | Director | 27 Oct 2023 | | England | March 1979 | Darlington Locomotive Works, 9 Bonomi Way, Darlington, County Durham, DL3 0PY, England |
| HUGHES, Gary Nigel ACTIVE | Director | 14 Jan 2026 | | England | May 1964 | Darlington Locomotive Works, 9 Bonomi Way, Darlington, County Durham, DL3 0PY, England |
| KYTE, Wayne Alan ACTIVE | Director | 11 Jun 2024 | | England | November 1960 | Darlington Locomotive Works, 9 Bonomi Way, Darlington, County Durham, DL3 0PY, England |
| LANGER, Graham Philip ACTIVE | Director | 22 Sep 2018 | | England | January 1961 | Darlington Locomotive Works, 9 Bonomi Way, Darlington, County Durham, DL3 0PY, England |
| ROE, Paul James ACTIVE | Director | 05 Aug 2026 | | England | April 1974 | Darlington Locomotive Works, 9 Bonomi Way, Darlington, County Durham, DL3 0PY, England |
| WALKER, James Christopher ACTIVE | Director | 22 Sep 2018 | | England | October 1943 | Darlington Locomotive Works, 9 Bonomi Way, Darlington, County Durham, DL3 0PY, England |
| WELSH, Martin Brian ACTIVE | Director | 15 Jan 2025 | | Scotland | April 1983 | Darlington Locomotive Works, 9 Bonomi Way, Darlington, County Durham, DL3 0PY, England |
| BURGESS, David Erwyn RESIGNED | Secretary | 26 Apr 2018 | 21 Jan 2019 | | | Darlington Locomotive Works, Hopetown Lane, Darlington, Co Durham, DL3 6RQ, United Kingdom |
| ALLATT, Mark Colin RESIGNED | Director | 26 Apr 2018 | 20 Dec 2021 | England | November 1965 | Darlington Locomotive Works, Hopetown Lane, Darlington, Co Durham, DL3 6RQ, United Kingdom |
| BRUCE, Paul Andrew RESIGNED | Director | 22 Sep 2018 | 11 Oct 2023 | England | February 1961 | Darlington Locomotive Works, 9 Bonomi Way, Darlington, County Durham, DL3 0PY, England |
| BURGESS, David Erwyn RESIGNED | Director | 26 Apr 2018 | 21 Jan 2019 | Guernsey | April 1948 | Darlington Locomotive Works, Hopetown Lane, Darlington, Co Durham, DL3 6RQ, United Kingdom |
| COURTENEY-HARRIS, Richard John RESIGNED | Director | 31 Dec 2020 | 05 May 2025 | United Kingdom | October 1957 | Darlington Locomotive Works, 9 Bonomi Way, Darlington, County Durham, DL3 0PY, England |
| ELLIOTT, David Andrew RESIGNED | Director | 22 Sep 2018 | 18 Nov 2020 | England | March 1951 | Darlington Locomotive Works, Hopetown Lane, Darlington, Co Durham, DL3 6RQ, United Kingdom |
| MCDONALD, Benjamin Mark RESIGNED | Director | 31 Dec 2020 | 28 Nov 2025 | England | January 1990 | Darlington Locomotive Works, 9 Bonomi Way, Darlington, County Durham, DL3 0PY, England |
| MORLAND, Robert John RESIGNED | Director | 22 Sep 2018 | 15 Dec 2018 | England | February 1955 | Darlington Locomotive Works, Hopetown Lane, Darlington, Co Durham, DL3 6RQ, United Kingdom |
| PARKER, Huw Jonathan RESIGNED | Director | 16 Nov 2018 | 31 Dec 2023 | England | April 1962 | Darlington Locomotive Works, 9 Bonomi Way, Darlington, County Durham, DL3 0PY, England |